Coffee and tea lovers everywhere have been eternally grateful for the invention of cup sleeves, the corrugated cardboard slip-on that allows users to hold their beverages without burning their hands, but Salih Kucukaga thought he could improve upon the already awesome product. Rather than make the sleeves optional, Kucukaga has designed cups that have the corrugated cardboard material already embedded onto them. Now people can enjoy hot drinks without an intermediary step between themselves and their favorite fluids.